Thanks Meintsi
I managed to resolve the issue using Visi Clone from Visimation - a very nifti utility that allows you to copy specific shape properties.
In particular if you clone the Controls, Character, Text Block Format, Text Transform and Connection Points Sections it duplicates P&ID shape...
I have created some new P&ID valve symbols but can not get them to behave like standard inbuilt Visio 2003 Process Engineering stencils.
Std valve symbols auto rotate on vertical pipelines, snap the line and glue to the two new ends. If you move the valve the lines auto move as well staying...